[ET Trac] [Einstein Toolkit] #1527: simfactory run script for bluewaters does not use -d or -cc numa_node

Einstein Toolkit trac-noreply at einsteintoolkit.org
Wed Jan 22 23:24:40 CST 2014


#1527: simfactory run script for bluewaters does not use -d or -cc numa_node
------------------------+---------------------------------------------------
 Reporter:  rhaas       |       Owner:  eschnett           
     Type:  defect      |      Status:  new                
 Priority:  minor       |   Milestone:                     
Component:  SimFactory  |     Version:  development version
 Keywords:              |  
------------------------+---------------------------------------------------
 the aprun man page states that
 {{{
 For OpenMP applications, use both the OMP_NUM_THREADS
 environment variable to specify the number of threads and
 the aprun -d option to specify the number of CPUs hosting
 the threads. ALPS creates -n pes instances of the
 executable, and the executable spawns OMP_NUM_THREADS-1
 additional threads per PE.
 }}}
 {{{-cc numa_node}}} is used on kraken (also a Cray using AMD cores) and
 lets threads migrate within a socket rather than tying them to an
 individual core.

 These changes improve run speed of qc0-mclachlan from 14 M/hr to 17 M/hr.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1527>
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